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the roof curb for each size unit. Length is dependent
on the various unit options ordered. Refer to
submittals for module lengths.
NOTE: CENTER THE UNIT BASE ON THE ROOF CURB.
Figure 15
Cross Sections
1.945
Size 3-30 = 4 in
Size 35-50 = 6 in
Size 66-100 = 8 in
3.00
2 in
1 in
14 in
3 in
Table 1
Specialty Roof Curb Dimensions
UNIT SIZE
Width
3
36
6
49
8
53
10
65
12
69
14
73
17
79
21
81
25
83
30
96
35
101
40
114
50
125
Installation
Unit Base
Unit Roof Curb
Length
Lm + 5
Lm + 5
Lm + 5
Lm + 5
Lm + 5
Lm + 5
Lm + 5
Lm + 5
Lm + 5
Lm + 5
Lm + 5
Lm + 5
Lm + 5
66
140
80
140
100
155
Where Lm is the sum of all module lengths in the unit. Lm does
not include the 3 inches for each end of the unit base.
Pipe cabinets ordered from Trane for field installation
require special attention with regard to joining the
unit roof curb and pipe cabinet roof curb. A good joint
will prevent any water management problems within
the pipe cabinet.
q
The pipe cabinet roof curb should be three-sided
and have dimensions as shown in
top view of the pipe cabinet roof curb, and
respectively. Dimension 'L' is from the outside of
the unit roof curb to the outside of the pipe cabinet
roof curb. Dimension 'X' is the outside-to-outside
width dimension of the pipe cabinet roof curb.
Dimension 'Z' locates the pipe chase roof curb
along the unit roof curb in the direction of airflow.
This measurement is from the outside of the unit
roof curb to the outside of the pipe cabinet roof
curb. The basic formula becomes
Z = LDM – 1
where LDM is the total length of the modules
downstream of the pipe cabinet including the 3-
inch end of the unit base.
Figure 16
Top View of Unit and Pipe Cabinet Roof Curbs
Pipe chase
roof curb
Z
X
Lm + 5
Lm + 5
Lm + 5
Figure 16
, a
Table 2
Unit roof curb
L
5
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